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← ScienceWhich risk increases when heavy nuclei exceed binding energy threshold?
A)Spontaneous nuclear fission✓
B)Heightened alpha decay rate
C)Increased beta decay emission
D)Enhanced neutron capture probability
💡 Explanation
Spontaneous fission probability increases because exceeding per-nucleon binding energy lowers the activation energy barrier. Thus, quantum tunneling (fission) is likelier rather than remaining stable, because other decay modes require additional energy input.
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